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Join Date: Nov 2007
Location: Chandler, Arizona
I'd say it was more likely you had a partially plugged idle jet in the rear carb. Idle jets plug up easier, and are more difficult to get cleaned out without actually physically cleaning them. The main jet is used most of the time, with lots of fuel flowing through it at highway speeds, so even if it gets slightly plugged up, highway riding for a few miles will usually clean it out. But the idle jet only gets fuel flow during low rpm use, and often doesn't get enough fuel flow through it to keep it clean. Constantly using Seafoam will usually work, but it's cheaper to drive a car. The main cause of plugged jets is either/both sitting around too much, and very poor quality gas. There was a time when gasoline (real gas, not moonshine) lasted longer than it does today.
The VN750 has a vacuum operated petcock, but I have seen carbs on bikes that didn't get completely gummed up it looked like they were full of Jello after 2-3 months, even though the gas in the tank was still good, or at least usable. The petcock was left on, and the float bowl on a carb is fairly small, and vented. Gas evaporates out of them quick. And with an open line to the tank, as gas evaporated, the needle valve let more in, and it too evaporated, all the while leaving behind the goo that does not evaporate. Pretty soon there was so much of that there was no more room for gas. I have cleaned many carbs in this condition. Over time this is inevitable, but it was amazing just how fast it happened. Again, just poor quality gas.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike